Cyclic oxy ether compounds as perfuming ingredients

ABSTRACT

Described herein is a method of using cyclic oxy ether compounds of formulain a form of any one of its stereoisomers or a mixture thereof, where the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3; n represents 0 to 2; R represents, independently from each other hydrogen, a C1-C6 alkyl or C2-C6 alkenyl group each optionally substituted by an ester group; and R1 represents, independently from each other, a hydrogen atom or a C1-C3 alkyl group, the method including using the compound of formula (I) as a perfuming ingredient.

TECHNICAL FIELD

The present invention relates to the field of perfumery. More particularly, it concerns the use as perfuming ingredients of cyclic oxy ether compounds. The present invention concerns the use of said compounds in the perfumery industry as well as the compositions or articles containing said compounds.

BACKGROUND OF THE INVENTION

To the best of our knowledge, none of the invention's compounds is known as perfuming compound or as having an odor in general.

WO 2011/101757 describes compounds having similar odor notes but being significantly different from the invention's compounds in that a carbonyl group is lacking on the alkylic ether substituent.

To the best of our knowledge, the prior art does not report or suggest any organoleptic properties of the compounds of formula (I), or any use of said compounds in the field of perfumery.

SUMMARY OF THE INVENTION

The invention relates to compound of formula (I) imparting floral-green (jasmin like) and watery notes.

So, a first object of the present invention is the use as perfuming ingredient of a compound of formula

in the form of any one of its stereoisomers or a mixture thereof, and wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3, preferably 1 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; R¹ represents, independently from each other, a hydrogen atom, or a C₁-C₃ alkyl group.

A second object of the present invention is a method to confer, enhance, improve or modify the odor properties of a perfuming composition or of a perfumed article, which method comprises adding to said composition or article an effective amount of at least a compound of formula

in the form of any one of its stereoisomers or a mixture thereof, and wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3, preferably 1 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; R¹ represents, independently from each other, a hydrogen atom, or a C₁-C₃ alkyl group.

A third object of the present invention is a compound of formula

in the form of any one of its stereoisomers or a mixture thereof, and wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3, preferably 1 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; R¹ represents, independently from each other, a hydrogen atom, or a C₁-C₃ alkyl group; provided that 4-(cyclopentyloxy)butanal, 4-(cyclopentyloxy)-2-ethyl-2-methylbutanal, 5-(cyclopentyloxy)pentanal, 5-(cyclopentyloxy)-2-ethyl-2-methylpentanal and 5-(cyclopentyloxy)-2,2-dimethylpentanal are excluded.

Another object of the invention is a perfuming composition comprising

-   i) at least one compound of formula (I), as defined above; -   ii) at least one ingredient selected from the group consisting of a     perfumery carrier and a perfumery base; and -   iii) optionally at least one perfumery adjuvant.

A further object of the invention is perfumed consumer product comprising at least one compound of formula (I), as defined above or a perfuming composition, as defined above.

DESCRIPTION OF THE INVENTION

Surprisingly, it has now been discovered that a compound of formula

in the form of any one of its stereoisomers or a mixture thereof, and wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3, preferably 1 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; R¹ represents, independently from each other, a hydrogen atom or a C₁-C₃ alkyl group; can be used as perfuming ingredient, for instance to impart odor notes of the floral-green (jasmin like) and watery types.

For the sake of clarity, by the expression “any one of its stereoisomers or a mixture thereof”, or the similar, it is meant the normal meaning understood by a person skilled in the art, i.e. that the compound of formula (I) can be a pure enantiomer or diastereomer. In other words, the compound of formula (I) may possess several stereocenters and each of said stereocenter can have two different stereochemistries (e.g. R or S). The compound of formula (I) may even be in the form of a pure enantiomer or in the form of a mixture of enantiomers or diastereoisomers. The compound of formula (I) can be in a racemic form or scalemic form. Therefore, the compound of formula (I) can be one stereoisomers or in the form of a composition of matter comprising, or consisting of, various stereoisomers.

For the sake of clarity, by the expression “optionally substituted by an ester group”, or the similar, it is meant the normal meaning understood by a person skilled in the art, i.e. that one hydrogen of the alkyl or alkenyl group may be substituted by a OC(═O)R^(a) or C(═O)OR^(a) group wherein R^(a) may represent a hydrogen atom or a C₁₋₄ alkyl group.

According to a particular embodiment, in the compounds of formula (I), p may represent 1, 2 or 3, preferably 1 or 2, even more preferably 1.

According to a particular embodiment, in the compounds of formula (I), n may represent 1 or 2, preferably 1.

According to a particular embodiment, in the compounds of formula (I), the dotted line may be a carbon-carbon double bond.

According to a particular embodiment of the invention, said compound of formula (I) is a compound of formula

wherein the definitions for p, R and R¹ are the same as above.

According to a particular embodiment, in the compounds of formula (II), p may represent 1 or 2, preferably 1.

According to a particular embodiment, in the compounds of formula (I) or (II), R may represent, independently from each other, a C₁-C₅ alkyl or C₂-C₅ alkenyl group each optionally substituted by an ester group. Preferably, R may represent a C₁-C₅ alkyl group. Even more preferably, R may represent a methyl, a pentyl or an iso-pentyl group.

According to a particular embodiment of the invention, said compound of formula (I) or particularly said compound of formula (II) is a compound of formula

wherein the definition of R¹ has the same meaning as defined above; R² represents a C₁-C₆ alkyl or C₂-C₆ alkenyl group; R³ represents a hydrogen atom or a C₁-C₆ alkyl group.

According to a particular embodiment, in the compound of formula (III), R² may represent a C₂-C₅ alkyl or C₂-C₅ alkenyl group, preferably a C₃-C₅ alkyl or C₃-C₅ alkenyl group, preferably a C₅ alkyl group, even more preferably a pentyl or an iso-entyl group.

According to a particular embodiment, in the compound of formula (III), R³ may represent a hydrogen atom or a C₁-C₃ alkyl group, preferably a hydrogen atom or a methyl group, even more preferably a hydrogen atom.

According to a particular embodiment, in the compounds of formula (I) to (III), R¹ may represent independently from each other hydrogen or a C₁-C₂ alkyl group, preferably a hydrogen atom or a methyl group.

According to a particular embodiment, in the compounds of formula (I) to (III), all R¹ may represent a hydrogen atom.

According to another particular embodiment, in the compounds of formula (I) to (III), one R¹ may represent a methyl group and the remaining R¹ may represent a hydrogen atom.

According to any one of the above embodiments of the invention, said compounds of formula (I) to (III) are C₁₀ to C₁₆ compounds, preferably C₁₁ to C₁₅ compounds, even preferably C₁₄ to C₁₅ compounds.

For the sake of clarity, by the expression “wherein one dotted line represents a carbon-carbon single or double bond” or the similar, it is meant the normal meaning understood by a person skilled in the art, i.e. that the whole bonding (e.g. solid and dotted line) between the carbon atoms connected by said dotted line is a carbon-carbon single or double bond.

The compounds of formula (I) are all new compounds and are therefore another object of the present invention, except 4-(cyclopentyloxy)butanal, 4-(cyclopentyloxy)-2-ethyl-2-methylbutanal, 5-(cyclopentyloxy)pentanal, 5-(cyclopentyloxy)-2-ethyl-2-methylpentanal and 5-(cyclopentyloxy)-2,2-dimethylpentanal.

As mentioned above, the odor of the invention's compounds is characterized by a green note, and in many cases by a floral-green (jasmine like) and watery note.

As specific examples of the invention's compounds, one may cite, as non-limiting example, (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal, which possesses a fresh, green, natural and watery connotation. The green note does not impart earthy and musty notes. Moreover, it is also noticeable that said compound blends particularly well with the floral notes of Hedione®, watery notes of Calone® and green notes of (Z)-3-hexen-1-ol.

As a further example, one may cite (±)-4-{[2-(3-methylbutyl)-2-cyclopenten-1-yl]oxy}butanal, (±)-2-methyl-3-[(3-methyl-2-pentyl-2-cyclopenten-1-yl)oxy]propanal or (±)-5-[(2-pentyl-2-cyclopenten-1-yl)oxy]pentanal, each of which possess an odor similar to (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal but slightly weaker.

According to a particular embodiment of the invention, the compounds of formula (I) are (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal, (±)-4-{[2-(3-methylbutyl)-2-cyclopenten-1-yl]oxy}butanal, (±)-2-methyl-3-[(3-methyl-2-pentyl-2-cyclopenten-1-yl)oxy]propanal or (±)-5-[(2-pentyl-2-cyclopenten-1-yl)oxy]pentanal.

According to another particular embodiment of the invention, the compounds of formula (I) are (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal.

When the odor of the invention's compounds is compared with that of the prior art compound 5-ethoxy-1-pentyl-1-cyclopentene, then the invention's compounds distinguish themselves by lacking the earthy note so characteristic of the prior art compound. Said differences lend the invention's compounds and the prior art compounds to be each suitable for different uses, i.e. to impart different organoleptic impressions.

As mentioned above, the invention concerns the use of a compound of formula (I) as a perfuming ingredient. In other words, it concerns a method or a process to confer, enhance, improve or modify the odor properties of a perfuming composition or of a perfumed article or of a surface, which method comprises adding to said composition or article an effective amount of at least a compound of formula (I), e.g. to impart its typical note. Understood that the final hedonic effect may depend on the precise dosage and on the organoleptic properties of the invention's compound, but anyway the addition of the invention's compound will impart to the final product its typical touch in the form of a note, touch or aspect depending on the dosage.

By “use of a compound of formula (I)” it has to be understood here also the use of any composition containing a compound (I) and which can be advantageously employed in the perfumery industry.

Said compositions, which in fact can be advantageously employed as perfuming ingredients, are also an object of the present invention.

Therefore, another object of the present invention is a perfuming composition comprising:

-   i) as a perfuming ingredient, at least one invention's compound as     defined above; -   ii) at least one ingredient selected from the group consisting of a     perfumery carrier and a perfumery base; and -   iii) optionally at least one perfumery adjuvant.

By “perfumery carrier” it is meant here a material which is practically neutral from a perfumery point of view, i.e. that does not significantly alter the organoleptic properties of perfuming ingredients. Said carrier may be a liquid or a solid.

As liquid carrier one may cite, as non-limiting examples, an emulsifying system, i.e. a solvent and a surfactant system, or a solvent commonly used in perfumery. A detailed description of the nature and type of solvents commonly used in perfumery cannot be exhaustive. However, one can cite as non-limiting examples, solvents such as butylene or propylene glycol, glycerol, dipropyleneglycol and its monoether, 1,2,3-propanetriyl triacetate, dimethyl glutarate, dimethyl adipate 1,3-diacetyloxypropan-2-yl acetate, diethyl phthalate, isopropyl myristate, benzyl benzoate, benzyl alcohol, 2-(2-ethoxyethoxy)-1-ethano, tri-ethyl citrate or mixtures thereof, which are the most commonly used. For the compositions which comprise both a perfumery carrier and a perfumery base, other suitable perfumery carriers than those previously specified, can be also ethanol, water/ethanol mixtures, limonene or other terpenes, isoparaffins such as those known under the trademark Isopar® (origin: Exxon Chemical) or glycol ethers and glycol ether esters such as those known under the trademark Dowanol® (origin: Dow Chemical Company), or hydrogenated castors oils such as those known under the trademark Cremophor® RH 40 (origin: BASF).

Solid carrier is meant to designate a material to which the perfuming composition or some element of the perfuming composition can be chemically or physically bound. In general such solid carriers are employed either to stabilize the composition, or to control the rate of evaporation of the compositions or of some ingredients. Solid carriers are of current use in the art and a person skilled in the art knows how to reach the desired effect. However by way of non-limiting examples of solid carriers, one may cite absorbing gums or polymers or inorganic materials, such as porous polymers, cyclodextrins, wood based materials, organic or inorganic gels, clays, gypsum talc or zeolites.

As other non-limiting examples of solid carriers, one may cite encapsulating materials. Examples of such materials may comprise wall-forming and plasticizing materials, such as mono, di- or trisaccharides, natural or modified starches, hydrocolloids, cellulose derivatives, polyvinyl acetates, polyvinylalcohols, proteins or pectins, or yet the materials cited in reference texts such as H. Scherz, Hydrokolloide: Stabilisatoren, Dickungs und Geliermittel in Lebensmitteln, Band 2 der Schriftenreihe Lebensmittelchemie, Lebensmittelqualitat, Behr's Verlag GmbH & Co., Hamburg, 1996.

The encapsulation is a well-known process to a person skilled in the art, and may be performed, for instance, by using techniques such as spray-drying, agglomeration or yet extrusion; or consists of a coating encapsulation, including coacervation and complex coacervation techniques.

As non-limiting examples of solid carriers, one may cite in particular the core-shell capsules with resins of aminoplast, polyamide, polyester, polyurea or polyurethane type or a mixture thereof (all of said resins are well known to a person skilled in the art) using techniques like phase separation process induced by polymerization, interfacial polymerization, coacervation or altogether (all of said techniques have been described in the prior art), optionally in the presence of a polymeric stabilizer or of a cationic copolymer.

Resins may be produced by the polycondensation of an aldehyde (e.g. formaldehyde, 2,2-dimethoxyethanal, glyoxal, glyoxylic acid or glycolaldehyde and mixtures thereof) with an amine such as urea, benzoguanamine, glycoluryl, melamine, methylol melamine, methylated methylol melamine, guanazole and the like, as well as mixtures thereof. Alternatively one may use preformed resins alkylolated polyamines such as those commercially available under the trademark Urac® (origin: Cytec Technology Corp.), Cymel® (origin: Cytec Technology Corp.), Urecoll® or Luracoll® (origin: BASF).

Other resins are the ones produced by the polycondensation of an a polyol, like glycerol, and a polyisocyanate, like a trimer of hexamethylene diisocyanate, a trimer of isophorone diisocyanate or xylylene diisocyanate or a Biuret of hexamethylene diisocyanate or a trimer of xylylene diisocyanate with trimethylolpropane (known with the tradename of Takenate®, origin: Mitsui Chemicals), among which a trimer of xylylene diisocyanate with trimethylolpropane and a Biuret of hexamethylene diisocyanate are preferred.

Some of the seminal literature related to the encapsulation of perfumes by polycondensation of amino resins, namely melamine based resins with aldehydes includes articles such as those published by K. Dietrich et al. Acta Polymerica, 1989, vol. 40, pages 243, 325 and 683, as well as 1990, vol. 41, page 91. Such articles already describe the various parameters affecting the preparation of such core-shell microcapsules following prior art methods that are also further detailed and exemplified in the patent literature. U.S. Pat. No. 4,396,670, to the Wiggins Teape Group Limited is a pertinent early example of the latter. Since then, many other authors have enriched the literature in this field and it would be impossible to cover all published developments here, but the general knowledge in encapsulation technology is very significant. More recent publications of pertinence, which disclose suitable uses of such microcapsules, are represented for example by the article of K. Bruyninckx and M. Dusselier, ACS Sustainable Chemistry & Engineering, 2019, vol. 7, pages 8041-8054.

By “perfumery base” what is meant here is a composition comprising at least one perfuming co-ingredient.

Said perfuming co-ingredient is not of formula (I). Moreover, by “perfuming co-ingredient” it is meant here a compound, which is used in a perfuming preparation or a composition to impart a hedonic effect. In other words such a co-ingredient, to be considered as being a perfuming one, must be recognized by a person skilled in the art as being able to impart or modify in a positive or pleasant way the odor of a composition, and not just as having an odor.

The nature and type of the perfuming co-ingredients present in the base do not warrant a more detailed description here, which in any case would not be exhaustive, the skilled person being able to select them on the basis of his general knowledge and according to the intended use or application and the desired organoleptic effect. In general terms, these perfuming co-ingredients belong to chemical classes as varied as alcohols, lactones, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenoids, nitrogenous or sulphurous heterocyclic compounds and essential oils, and said perfuming co-ingredients can be of natural or synthetic origin.

In particular one may cite perfuming co-ingredients knows for having a similar olfactive note, such as:

In particular one may cite perfuming co-ingredients which are commonly used in perfume formulations, such as:

-   -   Aldehydic ingredients: decanal, dodecanal, 2-methyl-undecanal,         10-undecenal, octanal, nonanal and/or nonenal;     -   Aromatic-herbal ingredients: eucalyptus oil, camphor,         eucalyptol, 5-methyltricyclo[6.2.1.0·2,7˜]undecan-4-one,         1-methoxy-3-hexanethiol, 2-ethyl-4,4-dimethyl-1,3-oxathiane,         2,2,7/8,9/10-Tetramethylspiro[5.5]undec-8-en-1-one, menthol         and/or alpha-pinene;     -   Balsamic ingredients: coumarin, ethylvanillin and/or vanillin;     -   Citrus ingredients: dihydromyrcenol, citral, orange oil, linalyl         acetate, citronellyl nitrile, orange terpenes, limonene,         1-p-menthen-8-yl acetate and/or 1,4(8)-p-menthadiene;         -   Floral ingredients: methyl dihydrojasmonate, linalool,             citronellol, phenylethanol,             3-(4-tert-butylphenyl)-2-methylpropanal, hexylcinnamic             aldehyde, benzyl acetate, benzyl salicylate,             tetrahydro-2-isobutyl-4-methyl-4(2H)-pyranol, beta ionone,             methyl 2-(methylamino)benzoate,             (E)-3-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one,             (1E)-1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-1-penten-3-one,             1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2-buten-1-one,             (2E)-1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2-buten-1-one,             (2E)-1-[2,6,6-trimethyl-3-cyclohexen-1-yl]-2-buten-1-one,             (2E)-1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-buten-1-one,             2,5-dimethyl-2-indanmethanol,             2,6,6-trimethyl-3-cyclohexene-1-carboxylate,             3-(4,4-dimethyl-1-cyclohexen-1-yl)propanal, hexyl             salicylate, 3,7-dimethyl-1,6-nonadien-3-ol,             3-(4-isopropylphenyl)-2-methylpropanal, verdyl acetate,             geraniol, p-menth-1-en-8-ol,             4-(1,1-dimethylethyl)-1-cyclohexyle acetate,             1,1-dimethyl-2-phenylethyl acetate,             4-cyclohexyl-2-methyl-2-butanol, amyl salicylate, high cis             methyl dihydrojasmonate, 3-methyl-5-phenyl-1-pentanol,             verdyl proprionate, geranyl acetate, tetrahydro linalool,             cis-7-p-menthanol, propyl             (S)-2-(1,1-dimethylpropoxy)propanoate, 2-methoxynaphthalene,             2,2,2-trichloro-1-phenylethyl acetate,             4/3-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carbaldehyde,             amylcinnamic aldehyde, 8-decen-5-olide, 4-phenyl-2-butanone,             isononyle acetate, 4-(1,1-dimethylethyl)-1-cyclohexyl             acetate, verdyl isobutyrate and/or mixture of methylionones             isomers;         -   Fruity ingredients: gamma-undecalactone,             2,2,5-trimethyl-5-pentylcyclopentanone,             2-methyl-4-propyl-1,3-oxathiane, 4-decanolide, ethyl             2-methyl-pentanoate, hexyl acetate, ethyl 2-methylbutanoate,             gamma-nonalactone, allyl heptanoate, 2-phenoxyethyl             isobutyrate, ethyl 2-methyl-1,3-dioxolane-2-acetate,             3-(3,3/1,1-dimethyl-5-indanyl)propanal, diethyl             1,4-cyclohexanedicarboxylate, 3-methyl-2-hexen-1-yl acetate,             1-[3,3-dimethylcyclohexyl]ethyl [3-ethyl-2-oxiranyl]acetate             and/or diethyl 1,4-cyclohexane dicarboxylate;         -   Green ingredients: 2-methyl-3-hexanone (E)-oxime,             2,4-dimethyl-3-cyclohexene-1-carbaldehyde,             2-tert-butyl-1-cyclohexyl acetate, styrallyl acetate, allyl             (2-methylbutoxy)acetate, 4-methyl-3-decen-5-ol, diphenyl             ether, (Z)-3-hexen-1-ol and/or             1-(5,5-dimethyl-1-cyclohexen-1-yl)-4-penten-1-one;         -   Musk ingredients: 1,4-dioxa-5,17-cycloheptadecanedione,             (Z)-4-cyclopentadecen-1-one, 3-methylcyclopentadecanone,             1-oxa-12-cyclohexadecen-2-one,             1-oxa-13-cyclohexadecen-2-one, (9Z)-9-cycloheptadecen-1-one,             2-{1S)-1-[(1R)-3,3-dimethylcyclohexyl]ethoxy}-2-oxoethyl             propionate 3-methyl-5-cyclopentadecen-1-one,             1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl-cyclopenta-g-2-benzopyrane,             (1S,1′R)-2-[1-(3′,3′-dimethyl-1′-cyclohexyl)ethoxy]-2-methylpropyl             propanoate, oxacyclohexadecan-2-one and/or             (1S,1′R)-[1-(3′,3′-dimethyl-1′-cyclohexyl)ethoxycarbonyl]methyl             propanoate;         -   Woody ingredients:             1-[(1RS,6SR)-2,2,6-trimethylcyclohexyl]-3-hexanol,             3,3-dimethyl-5-[(1R)-2,2,3-trimethyl-3-cyclopenten-1-yl]-4-penten-2-ol,             3,4′-dimethylspiro[oxirane-2,9′-tricyclo[6.2.1.0^(2,7)]undec[4]ene,             (1-ethoxyethoxy)cyclododecane,             2,2,9,11-tetramethylspiro[5.5]undec-8-en-1-yl acetate,             1-(octahydro-2,3,8,8-tetramethyl-2-naphtalenyl)-1-ethanone,             patchouli oil, terpenes fractions of patchouli oil,             Clearwood®,             (1′R,E)-2-ethyl-4-(2′,2′,3′-trimethyl-3′-cyclopenten-1′-yl)-2-buten-1-ol,             2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol,             methyl cedryl ketone,             5-(2,2,3-trimethyl-3-cyclopentenyl)-3-methylpentan-2-ol,             1-(2,3,8,8-tetramethyl-1,2,3,4,6,7,8,8a-octahydronaphthalen-2-yl)ethan-1-one             and/or isobornyl acetate;         -   Other ingredients (e.g. amber, powdery spicy or watery):             dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b]furan and             any of its stereoisomers, heliotropin, anisic aldehyde,             eugenol, cinnamic aldehyde, clove oil,             3-(1,3-benzodioxol-5-yl)-2-methylpropanal,             7-methyl-2H-1,5-benzodioxepin-3(4H)-one,             2,5,5-trimethyl-1,2,3,4,4a,5,6,7-octahydro-2-naphthalenol,             1-phenylvinyl acetate,             6-methyl-7-oxa-1-thia-4-azaspiro[4.4]nonan and/or             3-(3-isopropyl-1-phenyl)butanal.

A perfumery base according to the invention may not be limited to the above mentioned perfuming co-ingredients, and many other of these co-ingredients are in any case listed in reference texts such as the book by S. Arctander, Perfume and Flavor Chemicals, 1969, Montclair, N.J., USA, or its more recent versions, or in other works of a similar nature, as well as in the abundant patent literature in the field of perfumery. It is also understood that said co-ingredients may also be compounds known to release in a controlled manner various types of perfuming compounds also known as properfume or profragrance. Non-limiting examples of suitable properfume may include 4-(dodecylthio)-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2-butanone, 4-(dodecylthio)-4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-butanone, trans-3-(dodecylthio)-1-(2,6,6-trimethyl-3-cyclohexen-1-yl)-1-butanone, 2-phenylethyl oxo(phenyl)acetate or a mixture thereof.

According to a particular embodiment, the invention's composition comprises methyl dihydrojasmonate.

By “perfumery adjuvant”, it is meant here an ingredient capable of imparting additional added benefit such as a color, a particular light resistance, chemical stability, etc. A detailed description of the nature and type of adjuvant commonly used in perfuming composition cannot be exhaustive, but it has to be mentioned that said ingredients are well known to a person skilled in the art. One may cite as specific non-limiting examples the following: viscosity agents (e.g. surfactants, thickeners, gelling and/or rheology modifiers), stabilizing agents (e.g. preservatives, antioxidant, heat/light and or buffers or chelating agents, such as BHT), coloring agents (e.g. dyes and/or 20 pigments), preservatives (e.g. antibacterial or antimicrobial or antifungal or anti irritant agents), abrasives, skin cooling agents, fixatives, insect repellants, ointments, vitamins and mixtures thereof.

It is understood that a person skilled in the art is perfectly able to design optimal formulations for the desired effect by admixing the above mentioned components of a perfuming composition, simply by applying the standard knowledge of the art as well as by trial and error methodologies.

An invention's composition consisting of at least one compound of formula (I) and at least one perfumery carrier consists of a particular embodiment of the invention as well as a perfuming composition comprising at least one compound of formula (I), at least one perfumery carrier, at least one perfumery base, and optionally at least one perfumery adjuvant.

According to a particular embodiment, the compositions mentioned above, comprise more than one compound of formula (I) and enable the perfumer to prepare accords or perfumes possessing the odor tonality of various compounds of the invention, creating thus new building block for creation purposes.

For the sake of clarity, it is also understood that any mixture resulting directly from a chemical synthesis, e.g. a reaction medium without an adequate purification, in which the compound of the invention would be involved as a starting, intermediate or end-product could not be considered as a perfuming composition according to the invention as far as said mixture does not provide the inventive compound in a suitable form for perfumery. Thus, unpurified reaction mixtures are generally excluded from the present invention unless otherwise specified.

The invention's compound can also be advantageously used in all the fields of modern perfumery, i.e. fine or functional perfumery, to positively impart or modify the odor of a consumer product into which said compound (I) is added. Consequently, another object of the present invention consists of by a perfumed consumer product comprising, as a perfuming ingredient, at least one compound of formula (I), as defined above.

The invention's compound can be added as such or as part of an invention's perfuming composition.

For the sake of clarity, “perfumed consumer product” is meant to designate a consumer product which delivers at least a pleasant perfuming effect to the surface or space to which it is applied (e.g. skin, hair, textile, or home surface). In other words, a perfumed consumer product according to the invention is a perfumed consumer product which comprises a functional formulation, as well as optionally additional benefit agents, corresponding to the desired consumer product, and an olfactive effective amount of at least one invention's compound. For the sake of clarity, said perfumed consumer product is a non-edible product.

The nature and type of the constituents of the perfumed consumer product do not warrant a more detailed description here, which in any case would not be exhaustive, the skilled person being able to select them on the basis of his general knowledge and according to the nature and the desired effect of said product.

Non-limiting examples of suitable perfumed consumer products include a perfume, such as a fine perfume, a splash or eau de parfum, a cologne or a shave or after-shave lotion; a fabric care product, such as a liquid or solid detergent, a fabric softener, a liquid or solid scent booster, a fabric refresher, an ironing water, a paper, a bleach, a carpet cleaner, a curtain-care product; a body-care product, such as a hair care product (e.g. a shampoo, a coloring preparation or a hair spray, a color-care product, a hair shaping product, a dental care product), a disinfectant, an intimate care product; a cosmetic preparation (e.g. a skin cream or lotion, a vanishing cream or a deodorant or antiperspirant (e.g. a spray or roll on), a hair remover, a tanning or sun or after sun product, a nail product, a skin cleansing, a makeup); or a skin-care product (e.g. a soap, a shower or bath mousse, oil or gel, or a hygiene product or a foot/hand care products); an air care product, such as an air freshener or a “ready to use” powdered air freshener which can be used in the home space (rooms, refrigerators, cupboards, shoes or car) and/or in a public space (halls, hotels, malls, etc.); or a home care product, such as a mold remover, a furnisher care product, a wipe, a dish detergent or a hard-surface (e.g. a floor, bath, sanitary or a window-cleaning) detergent; a leather care product; a car care product, such as a polish, a wax or a plastic cleaner.

Some of the above-mentioned perfumed consumer products may represent an aggressive medium for the invention's compounds, so that it may be necessary to protect the latter from premature decomposition, for example by encapsulation or by chemically binding it to another chemical which is suitable to release the invention's ingredient upon a suitable external stimulus, such as an enzyme, light, heat or a change of pH.

The proportions in which the compounds according to the invention can be incorporated into the various aforementioned products or compositions vary within a wide range of values. These values are dependent on the nature of the article to be perfumed and on the desired organoleptic effect as well as on the nature of the co-ingredients in a given base when the compounds according to the invention are mixed with perfuming co-ingredients, solvents or additives commonly used in the art.

For example, in the case of perfuming compositions, typical concentrations are in the order of 0.001% to 20% by weight, or even more, of the compounds of the invention based on the weight of the composition into which they are incorporated. In the case of perfumed consumer product, typical concentrations are in the order of % by weight, or even more, of the compounds of the invention based on the weight of the consumer product into which they are incorporated.

The compounds according to the invention can be prepared by a method as described in the Examples below, i.e. by hydroformulation of a double bond, using for example synthesis gas CO/H₂. Due to the method of preparing the compounds of the invention by hydroformulation, the CO can be coupled on either one of the two carbons of a double bond. This would lead to different mixtures of regioisomers meaning that mixtures of linear or branched hydroformulation products can be obtained.

By using the method of preparing the compounds of the invention by hydroformulation, mixtures of linear and branched hydroformulation products of a double bond can be obtained. In a particular embodiment, the following particular products

can be obtained. The mixtures of the compounds can be obtained in mixtures of 99:1 to 40:60, preferably 95:5 to 60:40 or 90:10 to 70:30 (i.e. corresponding to the ratios linear: branched hydroformulation product). The mixtures of linear and branched hydroformulation products can also be used as a perfuming ingredient according to the present invention.

EXAMPLES

The invention will now be described in further detail by way of the following examples, wherein the abbreviations have the usual meaning in the art, the temperatures are indicated in degrees centigrade (° C.). NMR spectra were acquired using either a Bruker Avance II Ultrashield 400 plus operating at 400 MHz, (¹H) and 100 MHz (¹³C) or a Bruker Avance III 500 operating at 500 MHz (¹H) and 125 MHz (¹³C) or a Bruker Avance III 600 cryoprobe operating at 600 MHz (¹H) and 150 MHz (¹³C). Spectra were internally referenced relative to tetramethyl silane 0.0 ppm. ¹H NMR signal shifts are expressed in 8 ppm, coupling constants (f) are expressed in Hz with the following multiplicities: s, singlet; d, doublet; t, triplet; q, quartet; m, multiplet; b, broad (indicating unresolved couplings) and were interpreted using Bruker Topspin software. ¹³C NMR data are expressed in chemical shift 8 ppm and hybridization from DEPT 90 and DEPT 135 experiments, C, quaternary; CH, methine; CH₂, methylene; CH₃, methyl.

Example 1 Synthesis of Compounds of Formula (I) a) Preparation of (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal Step 1: Synthesis of (±)-5-allyloxy-1-pentyl-1-cyclopentene

The (±)-2-pentyl-2-cyclopenten-1-ol (40 g; 259 mmol) was dissolved in dry THF (0.3 liter) under nitrogen, and the solution was cooled into an ice-water bath. Solid potassium t-butoxide (36 g; 311 mmol) was added all at once. After 10 minutes, the cooling bath was removed and the reaction stirred for 1.5 hours. The reaction was cooled again into an ice-water bath. Tetrabutylammonium iodide (5.75 g; 15.6 mmol) was added, followed, after 10 minutes, by allyl chloride (59.5 g; 778 mmol) over 2 hours. The reaction was warmed up to RT and stirred overnight. It was then quenched with aq. sat. NH4Cl, extracted twice with diethyl ether. Extracts are washed with brine, dried over sodium sulfate and concentrated on the rotavapor. The product was purified by column chromatography on silica gel (eluent: heptane/ethyl acetate 19:1) followed by bulb-to-bulb distillation (60° C./1 mbar) to give (±)-5-allyloxy-1-pentyl-1-cyclopentene as a colorless liquid (38.6 g; 199 mmol; 77%).

¹³C-NMR: 144.81 (s); 135.64 (d); 127.46 (d); 116.36 (t); 85.46 (d); 69.36 (t); 31.89 (t); 30.07 (t); 29.94 (t); 28.37 (t); 27.35 (t); 22.60 (t); 14.08 (q).

¹H-NMR: 5.99-5.87 (m, 1H); 5.55 (broad s, 1H); 5.20 (m, 2H); 4.42 (m, 1H); 3.97 (m, 2H); 2.46-2.34 (m, 1H); 2.25-2.00 (m, 4H); 1.85-1.74 (m, 1H); 1.56-1.23 (m, 6H); 0.89 (t, 3H, J=7 Hz).

Step 2: Hydroformylation of (±)-5-allyloxy-1-pentyl-1-cyclopentene

(±)-5-allyloxy-1-pentyl-1-cyclopentene (10 g; 51 mmol) was dissolved in toluene (60 ml) and stirred in a stainless steel autoclave under 50 bar H₂/CO (55:45; syngas) in presence of [HRh(CO)(PPH₃)₃] (20 mg; 0.022 mmol) and triphenylphosphine (87 mg; 0.332 mmol) at 90° C. for 2h. The reaction was concentrated on the rotavapor and the crude material was directly purified by column chromatography on silica gel (eluent: heptane/ethyl acetate 19:1 to 9:1) followed by bulb-to-bulb distillation (85° C./0.03 mbar) to give (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal as a colorless liquid (5.5 g; 24 mmol; 47%).

¹³C-NMR: 202.45 (d); 144.64 (s); 127.41 (d); 86.04 (d); 67.15 (t); 41.09 (t); 31.85 (t); 30.06 (t); 29.82 (t); 28.35 (t); 27.31 (t); 22.95 (t); 22.57 (t); 14.07 (q).

¹H-NMR: 9.78 (t, 1H, J=1.6 Hz); 5.55 (m, 1H); 4.34 (m, 1H); 3.53 (m, 1H); 3.37 (m, 1H); 2.54 (m, 2H); 2.43-2.35 (m, 1H); 2.23-1.99 (m, 4H); 1.91 (m, 2H); 1.75 (m, 1H); 1.54-1.39 (m, 2H); 1.37-1.24 (m, 4H); 0.89 (t, 3H, J=7 Hz).

b) preparation of (±)-2-methyl-3-[(3-methyl-2-pentylcyclopent-2-en-1-yl)oxy]propanal

Using the same reaction sequence as described for example 1 a), (±)-3-hydroxy-1-methyl-2-pentylcyclopent-1-ene was converted to (±)-2-methyl-3-[(3-methyl-2-pentylcyclopent-2-en-1-yl)oxy]propanal. The product was obtained as a mixture of diastereoisomers after column chromatography on silica gel (eluent: heptane/ethyl acetate 19:1) followed by bulb-to-bulb distillation (75° C./0.01 mbar).

¹³C-NMR: 204.38 (d); 204.23 (d); 136.83 (s); 136.870 (s); 135.66 (s); 135.65 (s); 87.31 (d); 87.13 (d); 68.49 (t); 68.19 (t); 47.03 (d); 46.98 (d); 35.85 (t); 35.83 (t); 31.92 (t); 31.91 (t); 28.32 (t); 28.31 (t); 22.58 (t); 14.10 (q); 10.96 (q); 10.81 (q).

¹H-NMR: 9.74 (m, 1H); 4.44 (m, 1H); 3.69 (m, 1H); 3.50 (m, 1H); 2.62 (m, 1H); 2.43-2.34 (m, 1H); 2.21-1.98 (m, 4H); 1.73-1.66 (m, 1H); 1.65 (broad s, 3H); 1.47-1.19 (m, 6H): 1.22 (m, 3H); 0.89 (t, J=7 Hz, 3H).

c) Preparation of (±)-4-[(2-isopentylcyclopent-2-en-1-yl)oxy]butanal

Using the same reaction sequence as described for example 1 a), (±)-5-hydroxy-1-isopentyl-cyclopent-1-ene was converted to (±)-4-[(2-isopentylcyclopent-2-en-1-yl)oxy]butanal. The product was purified by column chromatography on silica gel (eluent: heptane/ethyl acetate 19:1 to 4:1) followed by bulb-to-buld distillation (85° C./0.05 mbar).

¹³C-NMR: 202.4 (d); 144.8 (s); 127.3 (d); 86.1 (d); 67.2 (t); 41.1 (t); 36.8 (t); 30.1 (t); 29.8 (t); 27.9 (d); 26.2 (t); 22.9 (t); 22.8 (q); 22.4 (q).

¹H-NMR: 9.78 (broad t, 1H); 5.54 (m, 1H); 4.34 (m, 1H); 3.53 (m, 1H); 3.37 (m, 1H); 2.54 (m, 2H); 2.42-2.34 (m, 1H); 2.22-1.98 (m, 4H); 1.91 (m, 2H); 1.74 (m, 1H); 1.55 (m, 1H); 1.35 (m, 2H); 0.91 (d, J=7 Hz, 3H); 0.89 (d, J=7 Hz, 3H).

d) Preparation of (±)-5-[(2-pentylcyclopent-2-en-1-yl)oxy]pentanal (coll. 74013) Step 1: Synthesis of (±)-5-(but-2-en-1-yloxy)-1-pentylcyclopent-1-ene

(±)-5-hydroxy-1-pentylcyclopent-1-ene (10.5 g; 68 mmol) was dissolved in dry THF (300 ml) under nitrogen, and the solution was cooled into an ice-water bath. Solid potassium t-butoxide (9.5 g; 82 mmol) was added all at once. After 10 minutes, the cooling bath was removed and the reaction stirred for 1.5 hours. The reaction was cooled again into an ice-water bath. n-Bu₄NI (1.5 g; 4 mmol) was added, followed, after 10 minutes, by 1-chlorobut-2-ene (26.4 g; 204 mmol) (exothermic reaction) over 2 hours. The reaction was warmed up to RT and stirred overnight. It was then quenched with aq. sat. NH₄Cl, extracted twice with diethyl ether. Extracts were washed with brine, dried over sodium sulfate and concentrated on the rotavapor. The product was purified by bulb-to-bulb distillation (60° C./1 mbar) to give (±)-5-(but-2-en-1-yloxy)-1-pentylcyclopent-1-ene as a colorless liquid (7 g; 33 mmol; 48%) and a 70/30 mixture of E/Z isomers.

¹³C-NMR: 144.89 (s); 144.88 (s); 128.68 (d); 128.39 (d); 127.72 (d); 127.33 (d); 127.28 (d); 127.19 (d); 85.25 (d); 85.12 (d); 69.11 (t); 63.62 (t); 31.87 (t); 30.11 (t); 30.06 (t); 29.98 (t); 29.92 (t); 28.36 (t); 28.35 (t); 27.31 (t); 22.59 (t); 17.78 (q); 14.08 (q); 13.18 (q).

¹H-NMR: 5.74-5.56 (m, 2H); 5.53 (m, 1H); 4.40 (m, 1H); 4.10-3.81 (m, 2H); 2.45-2.35 (m, 2H); 2.24-2.01 (m, 4H); 1.85-1.76 (m, 1H); 1.72-1.66 (m, 3H); 1.55-1.24 (m, 5H); 0.89 (m, 3H).

Step 2: (±)-5-[(2-pentylcyclopent-2-en-1-yl)oxy]pentanal

(±)-5-(but-2-en-1-yloxy)-1-pentyl-1-cyclopentene (6.5 g; 32 mmol) was dissolved in toluene (60 ml) and stirred in a stainless steel autoclave under 50 bar H₂/CO (55:45; syngas) in presence of [HRh(CO)(PPH₃)₃] (20 mg; 0.022 mmol) and triphenylphosphine (87 mg; 0.332 mmol) at 90° C. for 4h. The reaction was concentrated on the rotavapor and the crude material was directly purified twice by column chromatography on silica gel (eluent: heptane/ethyl acetate 19:1 to 9:1) followed by bulb-to-bulb distillation (85° C./0.03 mbar) to give (±)-5-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal as a colorless liquid (0.45 g; 1.8 mmol; 6%).

¹³C-NMR: 202.6 (d); 144.8 (s); 127.3 (d); 86.0 (d); 67.8 (t); 43.7 (t); 31.9 (t); 30.1 (t); 29.8 (t); 29.6 (t); 28.4 (t); 27.3 (t); 22.6 (t); 19.1 (t); 14.1 (q).

¹H-NMR: 9.77 (t, J=1.5 Hz, 1H); 5.54 (m, 1H); 4.34 (m, 1H); 3.51 (m, 1H); 3.35 (m, 1H); 2.46 (m, 2H); 2.43-2.35 (m, 1H); 2.24-2.01 (m, 4H); 1.80-1.68 (m, 3H); 1.65-1.58 (m, 2H); 1.55-1.39 (m, 2H); 1.37-1.25 (m, 4H); 0.89 (t, J=7 Hz, 3H).

Example 2 Preparation of a Perfuming Composition

A perfuming composition was prepared by admixing the following ingredients:

Ingredient Parts by weight 10%* Geranyl acetate extra 80 Allyl amyl glycolate 80 Ambrox ®¹ 100 Amione¹³ 20 Bergamote abergapt 1000 10%* Calone ®² 80 10%* Camphor 40 Cardamom 40 Cedarwood Oil 80 Lemon Oil 40 Clearwood ®¹⁷ 20 Coumarin 60 Cyclogalbanat¹⁴ 60 Dihydromyrcenol 1000 Floralozone⁹ 20 Guaiacwood Oil 40 Habanolide ®³ 1000 Hedione ®⁴ 2000 Heliopropanal¹⁵ 400 Helvetolide ®⁵ 400 Iso e super¹⁰ 800 1%* Labdanum cistus tombarel 60 10%* Liffarome¹¹ 60 Lilial¹² 100 Linalol 400 10%* sweet marjoram 80 Nutmeg 40 10%* Neobutenone ® alpha⁶ 80 10%* Osmanthus abs 80 Phenethylol 60 (Z)-3-hexen-1-ol 140 Polysantol ®⁷ 20 Precyclemone b 80 (Z)-3-hexen-1-ol salicylate 120 10%* 2-ethyl-4,4-dimethylcyclohexanone 40 10%* Undecavertol¹⁶ 40 10%* Violet 40 Beta ionone 160 Vulcanolide ®⁸ 20 10%* 2,4-Dimethyl-3-cyclohexene-1-carbaldehyde 20 9000 *in dipropyleneglycol ¹(−)-(8R)-8, 12-epoxy-13, 14, 15, 16-tetranorlabdane; origin: Firmenich SA, Geneva, Switzerland ²7-Methyl-2H, 4H-1,5-benzodioxepin-3-one; origin: Firmenich SA, Geneva, Switzerland ³1-oxacyclohexadec-12/13-en-2-one; origin: Firmenich SA, Geneva, Switzerland ⁴methyl 3-oxo-2-pentylcyclopentaneacetate; origin: Firmenich SA, Geneva, Switzerland ⁵(1S, 1′R)-2-[1-(3′,3′-dimethyl-1′-cyclohexyl)ethoxy]-2-methylpropyl propanoate; origin: Firmenich SA, Geneva, Switzerland ⁶1-(5,5-dimethyl-1-cyclohexenyl)pent-4-en-1-one; origin: Firmenich SA, Geneva, Switzerland ⁷(E)-3,3-dimethyl-5-(2,2,3-trimethy1-3-cyclopenten-1-yl)-4-penten-2-ol; origin: Firmenich SA, Geneva, Switzerland ⁸; origin: Firmenich SA, Geneva, Switzerland ⁹3-(4/2-ethylphenyl)-2,2-dimethylpropanal: origin: International Flavors & Fragrances, USA ¹⁰1-(Octahydro-2,3,8,8-tetramethyl-2-naphtalenyl)-1-ethanone; origin: International Flavors & Fragrances, USA ¹¹[(Z)-hex-3-enyl]methyl carbonate; origin: International Flavors & Fragrances, USA ¹²3-(4-Tert-butylphenyl)-2-methylpropanal; origin: Givaudan SA, Vernier, Switzerland ¹³allyl ionone; origin: Givaudan SA, Vernier, Switzerland ¹⁴prop-2-enyl 2-cyclohexyloxyacetate; origin: Symrise AG, Holzminden, Germany ¹⁵3-(1,3-benzodioxol-5-yl)-2-méthylpropanal; origin: Firmenich SA, Geneva, Switzerland ¹⁶4-methyl-3-decen-5-ol; origin: Givaudan SA, Vernier, Switzerland ¹⁷Patchouli extract, CAS number 84238-39-1 origin: Firmenich SA, Geneva, Switzerland

The addition of 1000 parts by weight of (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal to the above-described composition imparted to the latter a stronger, fresher, greener, more natural and more watery connotation. (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal blends particularly well with the floral-Hedione, watery-Calone and green-(Z)-3-hexen-1-ol elements.

When, instead of the invention's compound, 5-ethoxy-1-pentyl-1-cyclopentene was added, the above-described composition becomes greener, earthier and mustier. 5-Ethoxy-1-pentyl-1-cyclopentene does not blend well with the rest of the composition as it brings an unpleasant dirty-musty and earthy facet.

Example 3 Preparation of a Liquid Detergent Comprising the Invention's Compound

TABLE 1 Composition of the liquid detergent formulation Ingredients Concentration [wt %] Sodium C14-17 Alkyl Sec Sulfonate¹⁾ 7 Fatty acids, C12-18 and C18-unsaturated²⁾ 7.5 C12/14 fatty alcohol polyglycol ether 17 with 7 mol EO³⁾ Triethanolamine 7.5 Propylene Glycol 11 Citric acid 6.5 Potassium Hydroxyde 9.5 Properase L⁴⁾ 0.2 Puradax EG L⁴⁾ 0.2 Purastar ST L⁴⁾ 0.2 Acrylates/Steareth-20 Methacrylate 6 structuring Crosspolymer⁵⁾ Deionized Water 27.4 ¹⁾Hostapur SAS 60; Origin: Clariant ²⁾Edenor K 12-18; Origin: Cognis ³⁾Genapol LA 070; Origin: Clariant ⁴⁾Origin: Genencor International ⁵⁾Aculyn 88; Origin: Dow Chemical

The liquid detergent was prepared by adding 0.5 to 1.5% by weight, relative to the total weight of the liquid detergent, of the invention's composition of example 2 into the unperfumed liquid detergent formulation of Table 1 under gentle shaking.

Example 4 Preparation of a Fabric Softener Comprising the Invention's Compound

TABLE 2 Composition of the softener formulation Ingredient Concentration [wt %] Methyl bis[ethyl (tallowate)]-2- 12.20 hydroxyethyl ammonium methyl sulfate¹⁾ 1,2-benzisothiazolin-3-one²⁾ 0.04 CaCl₂ (10% aqueous solution) 0.40 Water 87.36 ¹⁾Stepantex VL90 A Diester Quat; Origin: Stepan ²⁾Proxel GXL; Origin: Arch

The softener was prepared by weighting Methyl bis[ethyl (tallowate)]-2-hydroxyethyl ammonium methyl sulfate which was heated at 65° C. Then Water and 1,2-benzisothiazolin-3-one were placed in the reactor and were heated at 65° C. under stirring. To the above mixture was added Methyl bis[ethyl (tallowate)]-2-hydroxyethyl ammonium methyl sulfate. The mixture was stirred 15 minutes and CaCl₂ was added. Then 0.5 to 2% by weight, relative to the total weight of the softener, of the invention's composition of example 2 was added. The mixture was stirred 15 minutes and was cooled down to room temperature under stirring (viscosity measure: result 35+/−5 mPas. (shear rate 106 sec-1)).

Example 5 Preparation of a Transparent Isotropic Shampoo Comprising the Invention's Composition

TABLE 3 Composition of the transparent isotropic shampoo formulation Concentration Phases Ingredients [wt %] A Water deionized 44.4 Polyquaternium-10 ¹⁾ 0.3 Glycerin 85% ²⁾ 1 DMDM Hydantoin ³⁾ 0.2 B Sodium Laureth Sulfate ⁴⁾ 28 Cocamidopropyl Betaine ⁵⁾ 3.2 Disodium Cocoamphodiacetate ⁶⁾ 4 Ethoxy (20) Stearyl Alcohol ⁶⁾ 1 C Sodium Laureth Sulfate ⁴⁾ 3 Glyceryl Laureate ⁷⁾ 0.2 D Water deionized 1 Sodium Methylparaben ⁸⁾ 0.1 E Sodium Chloride 10% aqueous sol. 15 Citric acid 10% aqueous sol. till pH 5.5-6 q.s. ¹⁾ Ucare Polymer JR-400, Origin: Noveon ²⁾ Origin: Schweizerhall 3) Glydant, Origin: Lonza ⁴⁾ Texapon NSO IS, Origin: Cognis ⁵⁾ Tego Betain F 50, Origin: Evonik ⁶⁾ Amphotensid GB 2009, Origin: Zschimmer & Schwarz ⁷⁾ Monomuls 90 L-12, Origin: Gruenau ⁸⁾ Nipagin Monosodium, Origin: NIPA

The shampoo was prepared by dispersed in water Polyquaternium-10. The remaining ingredients of phase A were mixed separately by addition of one after the other while mixing well after each adjunction. This pre-mix was added to the Polyquaternium-10 dispersion and mixed for another 5 min. Then, the premixed phase B and the premixed Phase C were added (Monomuls 90L-12 was heated to melt in Texapon NSO IS) while agitating. Phase D and Phase E were added while agitating. PH was adjusted with citric acid solution till pH: 5.5-6.0 leading to an unperfumed shampoo formulae. The perfumed shampoo was prepared by adding 0.4 to 0.8% by weight, relative to the total weight of the shampoo, of the invention's composition of example 2 into the unperfumed shampoo formulation of Table 3 under gentle shaking.

Example 6 Preparation of a Structured Shower Gel Comprising the Invention's Composition

TABLE 4 Composition of the shower gel formulation Ingredients Amount (% wt) WATER deionised 49.350 Tetrasodium EDTA ¹⁾ 0.050 Acrylates Copolymer²⁾ 6.000 Sodium C12-C15 Pareth Sulfate ³⁾ 35.000 Sodium Hydroxide 20% aqueous solution 1.000 Cocamidopropyl Betaine⁴⁾ 8.000 Methylchloroisothiazolinone and 0.100 Methylisothiazolinone⁵⁾ Citric Acid (40%) 0.500 ¹⁾ EDETA B POWDER; trademark and origin: BASF ²⁾CARBOPOL AQUA SF-1 POLYMER; trademark and origin: NOVEON ³⁾ ZETESOL AO 328 U; trademark and origin: ZSCHIMMER & SCHWARZ ⁴⁾TEGO-BETAIN F 50; trademark and origin: GOLDSCHMIDT ⁵⁾KATHON CG; trademark and origin: ROHM & HASS

The shower gel was prepared by adding 0.5 to 1.5% by weight, relative to the total weight of the shower gel, of the invention's composition of example 2 into the unperfumed shower gel formulation of Table 4 under gentle shaking.

Example 7 Preparation of a Transparent Shower Gel Comprising the Invention's Composition

TABLE 5 Composition of the transparent shower gel formulation Concentration Ingredients (% wt) WATER deionized 52.40 Tetrasodium EDTA¹⁾ 0.10 Sodium Benzoate 0.50 Propylene Glycol 2.00 Sodium C12-C15 Pareth Sulfate ²⁾ 35.00 Cocamidopropyl Betaine³⁾ 8.00 Polyquaternium-7⁴⁾ 0.20 Citric Acid (40%) 1.00 Sodium Chloride 0.80 ¹⁾ EDETA B POWDER; trademark and origin: BASF ²⁾ ZETESOL AO 328 U; trademark and origin: ZSCHIMMER & SCHWARZ ³⁾TEGO-BETAIN F 50; trademark and origin: GOLDSCHMIDT ⁴⁾MERQUAT 550; trademark and origin: LUBRIZOL

The transparent shower gel was prepared by adding 0.5 to 1.5% by weight, relative to the total weight of the shower gel, of the invention's composition of example 2 into the unperfumed shower gel formulation of Table 5 under gentle shaking.

Example 8 Preparation of a Milky Shower Gel Comprising the Invention's Composition

TABLE 6 Composition of the milky shower gel formulation Concentration Ingredients (% wt) WATER deionized 50.950 Tetrasodium EDTA ¹⁾ 0.050 Sodium Benzoate 0.500 Glycerin 86% 3.500 Sodium Laureth Sulfate²⁾ 27.000 Polyquaternium-7³⁾ 1.000 Coco-Betaine⁴⁾ 6.000 PEG-120 Methyl Glucose trioleate⁵⁾ 1.000 Citric Acid (40%) 1.000 Glycol Distearate & Laureth-4 & 3.000 Cocamidopropyl Betaine⁶⁾ Sodium Chloride 20% 5.000 PEG-40 Hydrogenated Castor Oil⁷⁾ 1.000 ¹⁾ EDETA B POWDER; trademark and origin: BASF ²⁾ Texapon NSO IS; trademark and origin: COGNIS ³⁾MERQUAT 550; trademark and origin: LUBRIZOL ⁴⁾DEHYTON AB-30; trademark and origin: COGNIS ⁵⁾GLUCAMATE LT; trademark and origin: LUBRIZOL ⁶⁾EUPERLAN PK 3000 AM; trademark and origin: COGNIS ⁷⁾CREMOPHOR RH 40; trademark and origin: BASF

The transparent shower gel was prepared by adding 0.5 to 1.5% by weight, relative to the total weight of the shower gel, of the invention's composition of example 2 into the unperfumed shower gel formulation of Table 6 under gentle shaking.

Example 9 Preparation of a Pearly Shampoo Comprising the Invention's Composition

TABLE 7 Composition of the pearly isotropic shampoo formulation Concentration Phases Ingredients (% wt) A Water deionized 45.97 Tetrasodium EDTA ¹⁾ 0.05 Guar Hydroxypropyltrimonium Chloride ²⁾ 0.05 Polyquaternium-10 ³⁾ 0.075 B NaOH 10% aqueous sol. 0.3 C Ammonium Lauryl Sulfate ⁴⁾ 34 Ammonium Laureth Sulfate ⁵⁾ 9.25 Cocamidopropyl Betaine ⁶⁾ 2 Dimethicone (&) C12-13 Pareth-4 (&) C12-13 2.5 Pareth-23 (&) Salicylic Acid ⁷⁾ D Cetyl Alcohol ⁸⁾ 1.2 Cocamide MEA ⁹⁾ 1.5 Glycol Distearate ¹⁰⁾ 2 E Methylchloroisothiazolinone & 0.1 Methylisothiazolinone ¹¹⁾ D-Panthenol 75% ¹²⁾ 0.1 Water deionized 0.3 F Sodium Chloride 25% aqueous sol. 0.6 ¹⁾ EDETA B Powder, Origin: BASF ²⁾ Jaguar C14 S, Origin: Rhodia ³⁾ Ucare Polymer JR-400, Origin: Noveon ⁴⁾ Sulfetal LA B-E, Origin: Zschimmer & Schwarz ⁵⁾ Zetesol LA, Origin: Zschimmer & Schwarz ⁶⁾ Tego Betain F 50, Origin: Evonik ⁷⁾ Xiameter MEM-1691, Origin: Dow Corning ⁸⁾ Lanette 16, Origin: BASF ⁹⁾ Comperlan 100, Origin: Cognis ¹⁰⁾ Cutina AGS, Origin: Cognis ¹¹⁾ Kathon CG, Origin: Rohm & Haas ¹²⁾ D-Panthenol, Origin: Roche

The shampoo was prepared by dispersed in water and Tetrasodium EDTA, Guar Hydroxypropyltrimonium Chloride and Polyquaternium-10. NaOH 10% solution (Phase B) was added once Phase A was homogeneous. Then, the premixed Phase C was added. and mixture was heated to 75° C. Phase D ingredients were added and mixed till homogeneous. The mixture was cooled down. At 45° C., Phase E ingredients were added while mixing. Final viscosity was adjusted with 25% NaCl solution and pH of 5.5-6 was adjusted with 10% NaOH solution.

The perfumed pearly shampoo was prepared by adding 0.4 to 0.8% by weight, relative to the total weight of the shampoo, of the invention's composition of example 2 into the unperfumed shampoo formulation of Table 7 under gentle shaking.

Example 10 Preparation of a Structured Shower Gel Comprising the Invention's Composition

TABLE 8 Composition of the milky shower gel formulation Amount Ingredients (% wt) WATER deionised 49.350 Tetrasodium EDTA ¹⁾ 0.050 Acrylates Copolymer²⁾ 6.000 Sodium C12-C15 Pareth Sulfate ³⁾ 35.000 Sodium Hydroxide 20% aqueous 1.000 solution Cocamidopropyl Betaine⁴⁾ 8.000 Methylchloroisothiazolinone and 0.100 Methylisothiazolinone⁵⁾ Citric Acid (40%) 0.500 6) EDETA B POWDER; trademark and origin: BASF 7) CARBOPOL AQUA SF-1 POLYMER; trademark and origin: NOVEON 8) ZETESOL AO 328 U; trademark and origin: ZSCHIMMER & SCHWARZ 9) TEGO-BETAIN F 50; trademark and origin: GOLDSCHMIDT 10) KATHON CG; tradeark and origin: ROHM & HASS

The transparent shower gel was prepared by adding 0.5 to 1.5% by weight, relative to the total weight of the shower gel, of the invention's composition of example 2 into the unperfumed shower gel formulation of Table 8 under gentle shaking.

Example 11 Preparation of a Eau De Toilette Comprising the Invention's Compound

The eau de toilette was prepared by adding 5 to 20% by weight, relative to the total weight of the eau de toilette, of the invention's composition of example 2 into ethanol under gentle shaking. 

1. A method of using a compound of formula

in a form of any one of its stereoisomers or a mixture thereof, wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; and R¹ represents, independently from each other, a hydrogen atom or a C₁-C₃ alkyl group, the method comprising using the compound of formula (I) as a perfuming ingredient.
 2. The method of use according to claim 1, wherein said compound (I) is of formula

wherein the definitions for p, R and R¹ are the same as defined in claim
 1. 3. The method of use according to claim 2, wherein said compound (I) or compound (II) is of formula

wherein the definition of R¹ is the same as defined in claim 1; R² represents a C₁-C₆ alkyl or C₂-C₆ alkenyl group; and R³ represents a hydrogen atom or a C₁-C₆ alkyl group.
 4. The method of use according to claim 3, wherein said compounds (I) to (III) are C₁₀ to C₁₆ compounds.
 5. The method of use according to claim 3, wherein said compounds (I) to (III) are (±)-4-[(2-pentyl-2-cyclopenten-1-yl)oxy]butanal.
 6. A method to confer, enhance, improve, or modify odor properties of a perfuming composition or of a perfumed article, which method comprises adding to said composition or article an effective amount of at least a compound of formula

in a form of any one of its stereoisomers or a mixture thereof, wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; and R¹ represents, independently from each other, a hydrogen atom, or a C₁-C₃ alkyl group.
 7. A compound of formula

in a form of any one of its stereoisomers or a mixture thereof, wherein the dotted line represents a carbon-carbon single or double bond; p represents 0 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; and R¹ represents, independently from each other, a hydrogen atom or a C₁-C₃ alkyl group; provided that 4-(cyclopentyloxy)butanal, 4-(cyclopentyloxy)-2-ethyl-2-methylbutanal, 5-(cyclopentyloxy)pentanal, 5-(cyclopentyloxy)-2-ethyl-2-methylpentanal, and 5-(cyclopentyloxy)-2,2-dimethylpentanal are excluded.
 8. A perfuming composition comprising i) at least one compound of formula (I)

in a form of any one of its stereoisomers or a mixture thereof, wherein the dotted line represents a carbon-carbon single or double bond; P represents 0 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; and R¹ represents, independently from each other, a hydrogen atom or a C₁-C₃ alkyl group; ii) at least one ingredient selected from the group consisting of a perfumery carrier and a perfumery base; and iii) optionally at least one perfumery adjuvant.
 9. A perfumed consumer product comprising at least one compound of formula (I)

in a form of any one of its stereoisomers or a mixture thereof, wherein the dotted line represents a carbon-carbon single or double bond; P represents 0 to 3; n represents 0 to 2; R represents, independently from each other, a C₁-C₆ alkyl or C₂-C₆ alkenyl group each optionally substituted by an ester group; and R¹ represents, independently from each other, a hydrogen atom or a C₁-C₃ alkyl group.
 10. The perfumed consumer product according to claim 9, wherein the perfumed consumer product is a perfume, a fabric care product, a body-care product, a cosmetic preparation, a skin-care product, an air care products or a home care product.
 11. The perfumed consumer product according to claim 10, wherein the perfumed consumer product is a fine perfume, a splash or eau de perfume, a cologne, a shave or after-shave lotion, a liquid or solid detergent, a fabric softener, a fabric refresher, an ironing water, a paper, a bleach, a carpet cleaner, a curtain-care product, a shampoo, a coloring preparation, a color care product, a hair shaping product, a dental care product, a disinfectant, an intimate care product, a hair spray, a vanishing cream, a deodorant or antiperspirant, a hair remover, a tanning or sun product, nail products, a skin cleansing, a makeup, a perfumed soap, shower or bath mousse, oil or gel, or a foot/hand care products, a hygiene product, an air freshener, a “ready to use” powdered air freshener, a mold remover, a furnisher care, a wipe, a dish detergent or hard-surface detergent, a leather care product, or a car care product.
 12. A perfumed consumer product comprising the perfuming composition according to claim
 8. 13. The perfumed consumer product according to claim 12, wherein the perfumed consumer product is a perfume, a fabric care product, a body-care product, a cosmetic preparation, a skin-care product, an air care product or a home care product.
 14. The perfumed consumer product according to claim 13, wherein the perfumed consumer product is a fine perfume, a splash or eau de perfume, a cologne, a shave or after-shave lotion, a liquid or solid detergent, a fabric softener, a fabric refresher, an ironing water, a paper, a bleach, a carpet cleaner, a curtain-care product, a shampoo, a coloring preparation, a color care product, a hair shaping product, a dental care product, a disinfectant, an intimate care product, a hair spray, a vanishing cream, a deodorant or antiperspirant, a hair remover, a tanning or sun product, nail products, a skin cleansing, a makeup, a perfumed soap, shower or bath mousse, oil or gel, or a foot/hand care products, a hygiene product, an air freshener, a “ready to use” powdered air freshener, a mold remover, a furnisher care, a wipe, a dish detergent or hard-surface detergent, a leather care product, or a car care product.
 15. The method of use according to claim 1, wherein p represents 1 to
 3. 16. The method according to claim 6, wherein p represents 1 to
 3. 17. The compound according to claim 7, wherein p represents 1 to
 3. 18. The perfuming composition according to claim 8, wherein p represents 1 to
 3. 19. The perfumed consumer product according to claim 9, wherein p represents 1 to
 3. 